1 /* 2 * Copyright (c) 2001 Markus Friedl. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 #include "includes.h" 25 RCSID("$OpenBSD: auth-bsdauth.c,v 1.5 2002/06/30 21:59:45 deraadt Exp $"); 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #ifdef BSD_AUTH 30 #include "xmalloc.h" 31 #include "auth.h" 32 #include "log.h" 33 #include "monitor_wrap.h" 34 35 static void * 36 bsdauth_init_ctx(Authctxt *authctxt) 37 { 38 return authctxt; 39 } 40 41 int 42 bsdauth_query(void *ctx, char **name, char **infotxt, 43 u_int *numprompts, char ***prompts, u_int **echo_on) 44 { 45 Authctxt *authctxt = ctx; 46 char *challenge = NULL; 47 48 if (authctxt->as != NULL) { 49 debug2("bsdauth_query: try reuse session"); 50 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); 51 if (challenge == NULL) { 52 auth_close(authctxt->as); 53 authctxt->as = NULL; 54 } 55 } 56 57 if (challenge == NULL) { 58 debug2("bsdauth_query: new bsd auth session"); 59 debug3("bsdauth_query: style %s", 60 authctxt->style ? authctxt->style : "<default>"); 61 authctxt->as = auth_userchallenge(authctxt->user, 62 authctxt->style, "auth-ssh", &challenge); 63 if (authctxt->as == NULL) 64 challenge = NULL; 65 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); 66 } 67 68 if (challenge == NULL) 69 return -1; 70 71 *name = xstrdup(""); 72 *infotxt = xstrdup(""); 73 *numprompts = 1; 74 *prompts = xmalloc(*numprompts * sizeof(char *)); 75 *echo_on = xmalloc(*numprompts * sizeof(u_int)); 76 (*echo_on)[0] = 0; 77 (*prompts)[0] = xstrdup(challenge); 78 79 return 0; 80 } 81 82 int 83 bsdauth_respond(void *ctx, u_int numresponses, char **responses) 84 { 85 Authctxt *authctxt = ctx; 86 int authok; 87 88 if (authctxt->as == 0) 89 error("bsdauth_respond: no bsd auth session"); 90 91 if (numresponses != 1) 92 return -1; 93 94 authok = auth_userresponse(authctxt->as, responses[0], 0); 95 authctxt->as = NULL; 96 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); 97 98 return (authok == 0) ? -1 : 0; 99 } 100 101 static void 102 bsdauth_free_ctx(void *ctx) 103 { 104 Authctxt *authctxt = ctx; 105 106 if (authctxt && authctxt->as) { 107 auth_close(authctxt->as); 108 authctxt->as = NULL; 109 } 110 } 111 112 KbdintDevice bsdauth_device = { 113 "bsdauth", 114 bsdauth_init_ctx, 115 bsdauth_query, 116 bsdauth_respond, 117 bsdauth_free_ctx 118 }; 119 120 KbdintDevice mm_bsdauth_device = { 121 "bsdauth", 122 bsdauth_init_ctx, 123 mm_bsdauth_query, 124 mm_bsdauth_respond, 125 bsdauth_free_ctx 126 }; 127 #endif 128